Definition of pentastichous in English:

pentastichous

adjective

Botany
  • Designating, relating to, or having a spiral arrangement of leaves in which there are five leaves in each turn of the spiral about the stem, and thus five vertical rows of leaves in the phyllotaxis.

Origin

Mid 19th century; earliest use found in Asa Gray (1810–1888), botanist. From scientific Latin pentastichus + -ous; compare -stichous.

Pronunciation

pentastichous

/pɛnˈtastɪkəs/